High efficiency hub for pressure jet helicopters



FIG. 1 is a perspective view of a high efficiency hub for pressure jethelicopters showing the new design;

FIG. 2 is a side view thereof;

FIG. 3 is a end view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom end view thereof.

The broken lines shown in the drawings represent portions of the highefficiency hub for pressure jet helicopters that form no part of theclaimed design.

The ornamental design for a high efficiency hub for pressure jethelicopters, as shown and described.